Plate Tectonics
By: Hannah Moon
What is Plate Tectonics?
• Plate Tectonics: A geological model in which earth’s lithosphere is divided into sections.
In other words….. A model that shows how earth’s crust is divided up and how it moves.
Other important words:Plate: A section of earth’s lithosphereBoundary: separation of two plates
http://commons.wikimedia.org/wiki/File:Map_plate_tectonics_world.gif
Pangaea
Originated by Alfred Wegener a German geologist who also studied meteorology. He found a paper in which said back in the period of Permian to Jurassic the same plant was found on two separate continents that are no where near each other today.
Pangaea – “All Lands” It lasted from the Permian to Jurassic Periods
http://3dparks.wr.usgs.gov/nyc/mesozoic/mesozoicbasins.htm http://www.uni-graz.at/en/print/igamwww/igamwww_praesentation.htm
Pangaea
Alfred Wegener studied meteorology but how does that relate to what he found?
They scientific community did not agree with Wegener. They thought that the forces to move the continents were “Insufficient to the rotation of the earth.”
He had to study patterns and climates (like what type of plants need what climate) he realized that the plant had to have the same climate on the two separate continents.
http://www.topnews.in/usa/why-tectonic-plates-move-way-they-do-24873
Pangaea
Sea-floor spreading- plates moving away from each other and producing newoceanic crust. (Harry Hess)
Arther Holmes assisted Wegener’s idea…..Stated that the thermal convection built up pressure that had
enough force to break continents apart.
http://geology12-8.wikispaces.com/Unit+2+Internal+Processes+and+Plate+Tectonic+Theory
Convergent Boundary
Also know as Subduction ZoneConvergent Boundary- a place where land can join together
Could cause….• Trench• Volcanoes• Mountains
EX: Juan de Fuca plate is joining/ sliding under the North American Plate
http://connect.in.com/marianas-trench-map-image/photos-1-1-1-e2a4883b6c2486ff6498120370745d7e.html
http://www.bergoiata.org/fe/Alaska3/10.htm
Divergent Boundary
Divergent Boundary- Moving plates away from each other
Could cause….• Volcano• Rift Zone
EX: East African Rift ZoneAfrican plate & Arabian plate moving away from one another
http://agoraevangelism.org/AboutUs/business%20documents/MajorEvents.html http://hays.outcrop.org/GSCI100/lecture17.html
Transform Boundary
Transform Boundary- Two plates slide past each otherCould cause:• Earthquakes
EX: San Andreas FaultNorth American plate sliding past the Pacific
plate
http://themostimportantnews.com/archives/hundreds-of-thousands-dead-haiti-earthquake-has-transformed-most-hospitals-houses-schools-grocery-stores-and-roads-to-piles-of-rubble
http://jazba.wordpress.com/2008/09/08/country-to-hit-another-earthquake-geophysicists
Plate Tectonics For UsYou must be wondering what is this
information worth to me?Well…. We live on the North American Plate
surrounding us are the Juan de Fuca & the Caribbean plates.In Cincinnati we are in no serious danger to plate tectonics.
One of the places that is, is the west coast. The Juan de Fuca plate is pushing underneath the plate we live on which poses possible hazards for the west coast.
http://www.archives.gov/nhprc/projects/states-territories/
Plate Tectonics for Us
Based on the information I have learned….The United States could have potential
problems in the VERY distant future. Those could be • The North American plate could spilt.
• A mountain could collapse also know as a landslide• An earthquake could cause mud to flow down a mountain
also known as mudslide
http://www.odt.co.nz/news/world/69246/400-feared-dead-mudslide http://news.bbc.co.uk/2/hi/in_pictures/7454599.stm
Citations from 1st page
http://www.psdgraphics.com/icons/photoshop-world-globe-icon/(Globe)
http://www.reikicentre.com.sg/category/blog/(lightbulb)
ANY QUESTIONS
??
THE END
Top Related